While Doctor Who is the lead of the show, there is usually a trio of people who make up the stars of the series.

Mel departed the TARDIS in the classic era serial “Dragonfire ... Jo decided to say goodbye to the Third Doctor in “The Green Death” after she fell in love with Cliff and planned to ...

the TARDIS no longer functions and by the story’s end, the Doctor has agreed to work for the Brigadier in return for the resources to try to repair his ship. Jon Pertwee is the third actor to ...

The time-traveling box in "Doctor Who," called the TARDIS, is easily the coolest part of the show. It's capable of traveling any direction through space and time — so it can visit any planet at ...